Appeared in the seventies worldwide energy crisis

Appeared in the seventies worldwide energy crisis, the AC motor variable frequency speed forlorn due to significant energy savings and rapid development. Frequency is the key technology for the DC inverter AC 0 ~ 100Hz. In the seventies to the eighties, with the popularity of frequency control devices, high-power inverter using thyristors, the giant power transistor (GTR) and gate turn off thyristor (GT0) became the power electronics the protagonist of the device.

 

Similar applications include high voltage DC output, static dynamic reactive power compensation. At this time of the power electronics technology has been able to achieve rectifier and inverter, but the frequency is low, only limited to the low frequency range.

 

Into the eighties, a large-scale and ultra large scale integrated circuit technology, the rapid development of modern power electronics technology laid the foundation. Integrated circuit technology and high precision machining technology combining high-current technology, there has been a number of new full-controlled power device, the first is the advent of power M0SFET, resulting in small power supply to the development of high-frequency, and then insulated gate very bipolar transistor (IGBT) appearance, but also for medium-sized power supply to the high development opportunities.

 

MOSFET and IGBT's one after another, is the traditional power electronics conversion to a modern symbol of power electronics. According to statistics, the end of 1995, power M0SFET and the GTR on the market in power semiconductor devices has reached the point where equal shares, but instead of using IGBT GTR in the field of power electronics Pat into a conclusion.

 

The development of new devices not only for AC motors provide high frequency control frequency, making it more comprehensive and reliable performance, and make modern electronic technology to the development of high-frequency, high efficiency electrical equipment for the energy and materials to achieve a small light quantify, and intelligent mechatronics provides an important technical foundation.

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